Download a free Illinois LLC Operating Agreement template (Word, Google Doc, PDF). List LLC Members, profit splits, tax info and more.Fill in your information. • My Name – Enter your first and last name. Wondering how to start a nonprofit in Illinois? If you are filing as a combined taxpayer, see Illinois Schedule UB,. Specific Instructions for Completing Form IL-1120. With a free Gateways Registry Membership, your education, credentials, and all Registry trainings you have attended will be tracked in the Registry database. Type your Member Number in the space above. See Example below of where to find your member number on the remit slip.